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微波强化钒钛磁铁矿直接还原过程研究

赵涛 余少武 温靖 邹志雪 李林 姜涛

赵涛, 余少武, 温靖, 邹志雪, 李林, 姜涛. 微波强化钒钛磁铁矿直接还原过程研究[J]. 钢铁钒钛, 2021, 42(4): 105-110. doi: 10.7513/j.issn.1004-7638.2021.04.018
引用本文: 赵涛, 余少武, 温靖, 邹志雪, 李林, 姜涛. 微波强化钒钛磁铁矿直接还原过程研究[J]. 钢铁钒钛, 2021, 42(4): 105-110. doi: 10.7513/j.issn.1004-7638.2021.04.018
Zhao Tao, Yu Shaowu, Wen Jing, Zou Zhixue, Li Lin, Jiang Tao. Research on microwave enhanced direct reduction of vanadium titano-magnetite[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(4): 105-110. doi: 10.7513/j.issn.1004-7638.2021.04.018
Citation: Zhao Tao, Yu Shaowu, Wen Jing, Zou Zhixue, Li Lin, Jiang Tao. Research on microwave enhanced direct reduction of vanadium titano-magnetite[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(4): 105-110. doi: 10.7513/j.issn.1004-7638.2021.04.018

微波强化钒钛磁铁矿直接还原过程研究

doi: 10.7513/j.issn.1004-7638.2021.04.018
基金项目: 国家自然科学基金资助项目(51174051, 51090383)
详细信息
    作者简介:

    赵涛(1996−),男,硕士研究生,E-mail:1901642@stu.neu.edu.cn;

    通讯作者:

    姜涛(1973−),男,教授,博士生导师,主要从事钢铁冶金基础研究工作,E-mail:jiangt@smm.neu.edu.cn

  • 中图分类号: TF55

Research on microwave enhanced direct reduction of vanadium titano-magnetite

  • 摘要: 以钒钛磁铁精矿为原料,直接还原工艺为基础,系统比较了不同加热方式对还原过程的影响。结果表明:与传统加热相比,微波加热能加快钒钛磁铁矿还原反应的进行,并且随温度升高效果越显著,在1350℃时铁金属化率可达到91.91%,提高了5.32个百分点;微波加热不会改变还原产物的物相组成,但使还原产物结构致密,气孔减少,晶粒粗大且分布均匀,脉石与金属铁嵌布紧密程度降低,相互之间夹杂的现象减少,有利于后续磨矿磁选过程中金属铁与脉石相的分离;另外,微波加热可以明显去除还原产物中P元素,而对于S元素的去除效果不显著,在1350℃时传统加热获得的产物中P含量为0.077%,S含量为0.29%,微波加热获得的产物中P含量为0.038%,S含量为0.28%。
  • 图  1  钒钛磁铁矿精矿XRD图谱

    Figure  1.  XRD pattern of the vanadium titano-magnetite ore

    图  2  微波还原的还原产物宏观形貌

    Figure  2.  Macro-morphology of reduction products in microwave reduction

    图  3  不同加热方式下1300 ℃还原30 min的还原产物XRD图谱

    Figure  3.  XRD patterns of reduction products reduced at 1 300 ℃ for 30 min under different heating methods

    图  4  不同加热方式的还原产物的SEM照片

    Figure  4.  SEM images of reduction products under different heating methods

    图  5  加热方式对金属化率的影响

    Figure  5.  Effect of heating method on metallization rate

    表  1  钒钛磁铁精矿的主要化学成分

    Table  1.   Main chemical components of vanadium titano-magnetite ore concentrate %

    TFeFeOTiO2SiO2Al2O3MgOCaOV2O5PS
    58.6127.637.013.23.01.350.920.2910.0280.19
    下载: 导出CSV

    表  2  无烟煤的工业分析

    Table  2.   Industry analysis results of anthracite

    固定碳/
    %
    挥发份/
    %
    灰分/
    %
    S/
    %
    弹筒发热量/
    (MJ·kg−1)
    82.499.208.780.3028.35
    下载: 导出CSV

    表  3  不同加热方式还原产物的S、P含量

    Table  3.   S and P contents of reduction products under different heating methods

    温度/℃w(S)/%w(P)/%
    传统加热微波加热传统加热微波加热
    11000.240.310.100.027
    11500.240.320.110.035
    12000.280.350.0950.041
    12500.320.300.0810.024
    13000.320.290.0900.032
    13500.290.280.0770.038
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-06-24
  • 刊出日期:  2021-08-10

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